By default, email messages classified by Anti-Spam as spam or probable spam are marked with special labels [!! SPAM] or in the field. If additional mail processing after Anti-Spam checks is required, you can configure Thunderbird having opened its configuration window from the Tools® Message Filters menu (for more details about using the mail client see Mozilla Thunderbird Help).
Thunderbird’s Anti-Spam plug-in module allows training based on messages received and sent using this email client application and checking your email correspondence for spam on the server. The plug-in module is integrated into Thunderbird and forwards messages to the Anti-Spam component for scanning when commands from the Tools® Run anti-spam filters in folder menu are being executed. As such, Kaspersky Internet Security checks messages instead of Thunderbird. This does not alter the functionality of Thunderbird.
The Anti-Spam plug-in module status is displayed as an icon in the Thunderbird status line. The gray color of the icon informs the use that there is a problem in the plug-in operation or that the Anti-Spam component is disabled. Double-click the icon to open the settings of Kaspersky Internet Security. To modify the Anti-Spam settings, click thebutton in the section.